Indicating means



Feb. 18, 1930. J. GELOSO INDICATING MEANS Filed July 25, 1929 \INVENTOR O 5 0 5 O 5 0 5 5 D a 5 .3 2 2 Patented Feb. 18, 1930 UNITED STATES PATENT OFFICE JOHN GELOSO, OF NEW YORK, N. Y., ASSIGNOR TO PILOT RADIO & TUBE CORPORATION, OF BROOKLYN, NEW YORK, A CORPORATION OF DELAWARE INDICATING MEANS Application filed July 25,

This invention relates to improvements in indicating devices being particularly directed to a form of indicating device of the drum type for radio receivers, in which indicators, operating control is directly in line with the drum and the illuminating indicia carried on said drum and visible at the front panel.

Specifically, it is aimed to provide for a novel form of friction control illuminated indicator member, operable from a control knob directly below and in line with the indicia carrier on said indicator, the actuation of said indicator being carried out through 1 frictional contact and frictional coaction of a cord with a peripheral surface'on the drum portion of the indicator.

Still further, it is aimed to provide a novel 7 form of mechanism forming the driving control for said indicator, which mechanism is so designed as to provide a continuous frictional contact between the cord and the driving mechanism, whereby there will be a positive displacement imparted to the indi- 26 cator drum in proportion to the rotation of the driving mechanism, thereby eliminating backlash, slippage or other difiiculties now encountered in the use of the friction type of indicators.

Still further, it is aimed to provide a novel form of connection for the driving means, to wit: the cord, wherein one end thereof is fixed to the indicator drum and the other end is fixed to a resilient connected mechanism attached to the drum, whereby to prolong the life of the cord by eliminating excessive tension on the cord at the extreme limits in movement of the dial.

, These and other advantages, capabilities 4.0 and features of the invention will appear from the subjoined detail description of one s ecific embodiment therefor illustrated in t 1e accompanying drawings, in which:

Figure 1 is a side elevation of the device;

Figure 2, is a plan view of the device;

Figure 3, is a front elevation partly in section of the device;

Figure 4, is a side elevation partly in sec-- tion of the driving mechanism.

Referring to the reference characters in 1929. Serial No. 380,858.

the drawing, numeral 10, represents a frame or support member comprising a stamped metal element substantially U-shaped,' and having a projection 11 resting directly on the sub-panel of a radio receiver, the front wall 12 of the support member being adapted to be fastened to the rear of the front panel by means not shown, and the two side walls 13 and 14, being adapted to enclose the indicia carrying drum as will be later descril ed.

The indicator element comprises a disk 15, formed of a phenolic condensation product, said disk having an annular projection 16 formed on one side thereof, which annular projection surrounds a depressed area 17. The disk 15, has a hub portion 18, formed centrally therewith, through which hub there passes shaft 19, said shaft being adapted to be carried for rotation in closed and open bearings 20 and 21, formed in the side walls 14 and 13, the said shaft being hollowed as at 22, for the insertion of a condenser shaft not shown, which condenser shaft may be fixed to shaft 19, by means of set screws 23, on opposite sides of the shaft, of which only one shaft 23 is shown in the drawing.

Since one of the bearing surfaces is formed by an open slot 21, it is obvious that the assembled disk 15, carrying a translucent strip 24, having indicia thereon at its outer periphery fastened thereto as by means of screws 25, can be readil inserted in position between the walls 13 and 14 of the frame, by merely inserting the end of the shaft inthe closed aperture 22, and then dropping the other end of the shaft into the slot 21, of wall 14, at which time the edges of the wall adjacent the slot ride in the groove 26 formed in said shaft. The annular wall 16 of the disk has a plurality of stops 27 and 28 thereon, which stops contact respectively with the top 29 and the side 30 of the Wall 14, whereby the displacement of the disk carrying the indicia is limited in a rotative movement in each direction. An aperture 31, comprising a narrow slit is formed in the annular wall 16, whereby there may pass therethrongh the cord 32, one end of the cord being fastened in the'form of a knot as at 33, to positively locate the same, the

cord then passes along the outer periphery to the annular projection 16, to pulley 34 mounted for rotation on pin 35, fixed to an angular projecting cut out portion 36, formed integral with wall 14. From there the cord passes into the driving pulley 37, mounted on shaft 38, which shaft is journalled in the bearing formed in front wall 12 and the front wall of the panel not shown, the end of the shaft having knob 39, fixed thereto, for actuation thereof. From the driving shaft the cord passes on to pulley 40, mounted on pin 41, in front wall 12, thence to pulley 42, right angularly disposed with respect to pulley 40, and mounted on pin 43 fixed in side wall 14, from which point the cord passes around the outer periphery-of the projectionl6, thence to an angularly disposed aperture 44, formed therein intothe hollow portion 17, where it is fastened to one end of spring 45, the other end of which is fixed as at 46, to the side wall of the disk.

Referring now to Figure 3, a lamp 47 carried on a rubber insulation piece 48, is mounted in the slot portion 49, shown in dotted lines of Figure 3, on wall 13, said light being adapted to be to the rear of the translucent indicator strip and within the hollow portions of the drum formed by the strip and the disk, the light being so disposed whereby the indicia passing an aperture in the front panel not shown, may be visible to the user.

Referring particularly to Figure 4, where the drivin means is more clearly detailed, it should be noted that the drivin pulley comprises two separate disks, 50 an 51, the said disk 51, being formed integral with hub 52, which is fixed to shaft 38, by set screw 53, the hub being adapted to project slightly on the other side of the disk 51, as at 54, was to form the bearing surface and fixedly carrying the disk 50, which comprises a resilient member formed of phosphor bronze, the washers and 55, are positioned between the hub 52, and bearing member 56, which serves to carry shaft 38, and to position the frame 10, onthe panel of the radio receiver not shown. The particular function of the pulle formed of the two angularly formed disk elements, one of which is a resilient phosphor bronze member, as to provide for a means, here the disk member 50, which as the cord presses inwardly towards the shaft will be urged away slightly with the result that there will be a constant reaction on the part of the disk 50, due to its resiliency to go back to its original position, whereupon the cord will be firmly gripped by the two disk elements, 50 and 51,.and caused to be continually and positively actuated upon the rotation of the knob.

It is obvious that various changes and modifications may be made to the details of construction without departing from the general spirit of the invention as set forth in the appended claims.

I claim:

1. In a device of the class described, the

combination with a frame member, of a shaft supported for rotation on said frame member, a disk mounted on said shaft and having fixed on its outer periphery a translucent indicia carrying member, whereby to form a ing through said projecting Wall and fixed to a resilient member positioned in said hollowed compartment, said cord member being adapted to frictionally contact with the outer periphery of said projecting wall, whereby the displacement of said driving means causes the actuation of said drum.

2. In a device of the class described, the combination with a frame member, of a shaft supported for rotation on said frame member, a disk mounted on said shaft and having fixed on its outer periphery a translucent indicia carrying member, whereby to form a hollow drum shaped element, an annular projecting wall formed on one side of said disk, and defining 'an interiorly hollowed compartment, driving means mounted on said frame, and a cord passing over and frictionally contacting with said driving means, said cord having one end passing through and fixed to said projecting wall, and the other end assing through said projecting wall, and 'xed'to a resilient member positioned in said hollow compartment, said cord member being adapted to frictionally contact with the outer periphery of said projecting Wall, whereby" the displacement of said driving means causes the actuation of said drum, and illuminating means mounted on said drum frame to the rear ofsaid translucent strip.

3. In a device of the class, described, the

combination with a frame member of a shaft supported for rotation on said frame member, a disk mounted on said shaft and having fixed on its outer periphery a translucent indicia carrying member, whereby to form a hollow drum shaped element, an annular projecting wall formed on one side of said disk,

and defining an interiorly hollowed compartment, driving means mounted on said frame, and a cord passing over and frictionally contacting with said driving means, said.

wall, whereby the displacement of said driving means causes the actuation of said drum, and abutments extending from said annular projecting wall, and cooperating with the portions of said frame member, whereby to limit the displacement in either direction of said disk. i

4. An indicator for radio receiving elements, comprising a frame member, driving means journalled for rotation in said frame member, pulleys mounted on said frame, a disk jou'rnalled for rotation on said frame and having an indicia carrying strip on its outer periphery, an annular projection formed on one face of said disk, a driving cord fixed at one end to said projection and passing along the outer periphery thereof, onto the pulleys, and the driving means, means for resiliently supporting said cord at its other end, so as to prevent excessive strain to said cord, and abutments formed on said projection for contacting with the frame, whereby to limit the displacement of the disk in either direction.

5. Control means for radio indicating mechanisms, comprising a drive shaft and a plurality of disks mounted for rotation thereon, one of said disks having a hub formed integral therewith, whereby the said disk may be attached to the shaft, said disk having an annular projection upon which the other disk may be mounted, in position adjacent the first named disk, whereby to form a groove, said last named disk being formed of resilient metal, an indicia carrying drum associated with said driving means, and a cord fixed at its ends to said drum, and contacting frictionally with a surface on said drum, a loop of said cord being adapted to pass over the groove formed by said disks, the loop of cord at all times being adapted to be in constant frictional contact with the disks through the reaction of the resilient disk, to the loop of cord, irrespective of the degree of tension of the cord.

6. In a device of the class described, the combination with a disk carrying idicia, of a cord mounted for frictional contact with an annular projection on said disk, and friction control means for contacting with said cord, to cause the displacement of the same, said control means comprising a plurality of disks between which a loop of said cord is disposed, one of said disks being resilient and adapted to maintain constant friction against the loop of the cord passing between the disks.

7. In a device of the class described, the combination with a disk carrying translucent indicating means therein, an annular projection at one side of said disk, a cord in frictional contact with the projection on said disk and fixed at its ends to said disk interiorly of said projection, driving means comprising of a plurality of plates, having a loop of said 

